No

you don't need a jacket based on the weather in Hesperia, CA, USA 1 second ago

61°F16°C & Clear

Wind is 7 mph11 km/h from the Southwest, gusting to 12 mph19 km/h
May 23
6am61°F16°C7 mph12 km/h SouthwestClear
7am59°F15°C7 mph11 km/h SouthwestClear
8am58°F14°C7 mph11 km/h SouthwestClear
9am58°F14°C7 mph11 km/h SouthwestClear
10am63°F17°C7 mph11 km/h SouthwestClear
11am69°F21°C8 mph12 km/h SouthwestClear
12pm74°F23°C9 mph15 km/h SouthwestClear
1pm76°F24°C11 mph17 km/h SouthClear
2pm78°F26°C12 mph20 km/h SouthClear
3pm80°F26°C14 mph23 km/h SouthClear
4pm81°F27°C16 mph25 km/h SouthWindy
5pm81°F27°C17 mph27 km/h SouthWindy
DateLowHighWindDayNight
May 2357°F14°C81°F27°C14 mph23 km/h from SouthClearPartly Cloudy
May 2454°F12°C74°F23°C14 mph23 km/h from SouthClearClear
May 2551°F11°C81°F27°C9 mph14 km/h from SouthwestClearClear
May 2654°F12°C80°F26°C10 mph17 km/h from SouthMostly ClearMostly Clear
May 2752°F11°C84°F29°C6 mph10 km/h from SouthwestClearMostly Clear
May 2855°F13°C83°F28°C7 mph11 km/h from SouthMostly ClearClear
May 2955°F13°C89°F32°C8 mph12 km/h from SoutheastClearMostly Clear

Yes

Low of 55°F13°C, High of 74°F24°C
Wind: 14 mph23 km/h
Precipitation: None

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